maintaining, cleaning and repairing of gravity and pumping pipeline of under ground sewage project for works site of anklav nagarpalika including all pumping station, all sewer network, all house connection network including house connection chamber, all repairing of damage sewer network, replacement of any damage sewer network pipeline including house connection network, repairing renovation of all type of chambers class a,b,c,d including house connection chambers with drainage chambers frame and c
